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Nickel(II) chloride dihydrate

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Identification
Molecular formula
NiCl2·2H2O
CAS number
13821-20-0
IUPAC name
nickel;dihydrate
State
State

At room temperature, nickel(II) chloride dihydrate is a solid. It is commonly used in its crystalline form for laboratory purposes.

Melting point (Celsius)
100.00
Melting point (Kelvin)
373.00
Boiling point (Celsius)
973.00
Boiling point (Kelvin)
1 246.00
General information
Molecular weight
129.60g/mol
Molar mass
129.5990g/mol
Density
1.9200g/cm3
Appearence

Nickel(II) chloride dihydrate appears as light green orthorhombic crystals. The color may vary from yellow-green to very pale green depending on the surrounding light conditions. It is hygroscopic, meaning it can absorb moisture from the air.

Comment on solubility

Solubility of Nickel(II) Chloride Dihydrate (NiCl2·2H2O)

Nickel(II) chloride dihydrate, with the formula NiCl2·2H2O, exhibits interesting solubility characteristics that are essential for its applications in various chemical processes.

Solubility in Water

It's important to note that NiCl2·2H2O is highly soluble in water. Some key points regarding its solubility include:

  • Solubility Level: At room temperature, it can dissolve in water exceeding 100 g/L.
  • Temperature Effect: Solubility tends to increase with rising temperature, making it easier to dissolve at higher temperatures.
  • Hydration Matter: The presence of two water molecules in the structure plays a crucial role in its dissolution process, providing hydration to the nickel ions.

Solubility in Organic Solvents

In contrast to its excellent behavior in aqueous solutions, NiCl2·2H2O has limited solubility in most organic solvents, which can be summarized as follows:

  • Polar Solvents: It may have slight solubility in some polar organic solvents.
  • Non-Polar Solvents: It is generally insoluble in non-polar organic solvents, which limits its use in organic chemistry.

Final Consideration

Consequently, the solubility of NiCl2·2H2O in water marks it as an effective reagent in aqueous solutions. This characteristic is particularly advantageous in biological and industrial applications where nickel ions need to be easily accessed. Understanding the solubility behavior helps in optimizing its usage in various fields.

Interesting facts

Exploring Nickel(II) Chloride Dihydrate

Nickel(II) chloride dihydrate, also known as nickel dichloride dihydrate, is a fascinating chemical compound with a variety of applications in both laboratory settings and industrial processes. Here are some intriguing aspects of this compound:

  • Versatile Applications: Nickel(II) chloride dihydrate is extensively used in the production of nickel electroplating solutions, which are essential for enhancing the longevity and corrosion resistance of various metals.
  • Catalytic Role: This compound acts as a catalyst in several chemical reactions, facilitating processes in organic synthesis and the production of pharmaceuticals.
  • Hydration Significance: The presence of water molecules in its hydrate form significantly influences its chemical properties, as they participate in coordination complexes and affect solubility.
  • Historical Note: Nickel has been recognized since the 15th century, though it wasn't isolated until the 18th century. Nickel(II) chloride itself has been crucial in various discoveries related to coordination chemistry.
  • Safety Considerations: While nickel(II) chloride is valuable, it is important to handle it with care due to its potential toxicity and environmental effects, particularly in aquatic settings.

Chemical Structure and Behavior

Nickel(II) chloride dihydrate forms a distinctive structure that consists of nickel ions surrounded by water molecules and chloride ions. This arrangement allows for unique interactions, making it a subject of study in coordination chemistry. The compound typically exists in crystalline form, and its properties can change depending on the coordination with ligands and the number of water molecules involved in its structure.

Research involving nickel(II) chloride dihydrate continues to unveil new insights into its reactivity patterns and practical applications, making it an essential compound for both chemistry students and professionals alike.

Synonyms
Nickel dihydroxide
dihydroxynickel
nickel;dihydrate
Nickel(2+) hydroxide
Nickel Hydroxide nanowire
SCHEMBL28519181
Nickel(II) hydroxide, for analysis
MFCD00011140
AKOS015903693
CS-0089243